Exercise unit



FIG. 1 is a perspective view of the exercise unit showing the new design;

FIG. 2 is a top elevational view of the embodiment of FIG. 1;

FIG. 3 is a back elevational view of the embodiment of FIG. 1;

FIG. 4 is a side elevational view of the embodiment of FIG. 1;

FIG. 5 is a front elevational view of the embodiment of FIG. 1; and,

FIG. 6 is a bottom elevational view of the embodiment of FIG. 1. 

The ornamental design for an exercise unit, as shown and described. 